1+15+15*15/2+15*15*15/6 eching

$$1+15+ \frac{ 15 \times 15 }{ 2 } + \frac{ 15 \times 15 \times 15 }{ 6 }$$

Baholash

$$691$$

Yechim qadamlari

16 olish uchun 1 va 15'ni qo'shing.

$$16+\frac{15\times 15}{2}+\frac{15\times 15\times 15}{6}$$

225 hosil qilish uchun 15 va 15 ni ko'paytirish.

$$16+\frac{225}{2}+\frac{15\times 15\times 15}{6}$$

16 ni \frac{32}{2} kasrga o‘giring.

$$\frac{32}{2}+\frac{225}{2}+\frac{15\times 15\times 15}{6}$$

\frac{32}{2} va \frac{225}{2} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{32+225}{2}+\frac{15\times 15\times 15}{6}$$

257 olish uchun 32 va 225'ni qo'shing.

$$\frac{257}{2}+\frac{15\times 15\times 15}{6}$$

225 hosil qilish uchun 15 va 15 ni ko'paytirish.

$$\frac{257}{2}+\frac{225\times 15}{6}$$

3375 hosil qilish uchun 225 va 15 ni ko'paytirish.

$$\frac{257}{2}+\frac{3375}{6}$$

\frac{3375}{6} ulushini 3 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{257}{2}+\frac{1125}{2}$$

\frac{257}{2} va \frac{1125}{2} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$\frac{257+1125}{2}$$

1382 olish uchun 257 va 1125'ni qo'shing.

$$\frac{1382}{2}$$

691 ni olish uchun 1382 ni 2 ga bo‘ling.

$$691$$

Omil

$$691$$